package alg20250307;

public class Text2 {
    public int takeAttendance(int[] records) {
        int left = 0, right = records.length - 1;
        while(left < right){
            int mid = left + (right - left) / 2;
            if(records[mid] == mid){
                left = mid + 1;
            }else {
                right = mid;
            }
        }
        return left;
    }
}
